Adjustable spring-bolt



(Model.) P. FORG.

ADJUSTABLE SPRING BOLT.

/m/MWM N4 PETERS, Phuwmnngmyner. wmngum, ne.

UNITED STATES PATENT OFFICE.

PETEE` EoEc., E SoMEEviLLE, MASSACHUSETTS.

ADJUSTABLE SPRING-BOLT.

SPECIFICATIONforming part of Letters Patent No. 256,559, dated April18,1882. Application tiled March 29, 1881. Renewed November 4, 188i.`(Model.)

To all whom t'tmay concern:

Be it known that I, PETER FORG, of Somerville, county of Middlesex,State of Massachusetts, have invented a new and useful Improvement inCatches, of which the following descriptiomin connection with theaccompanying drawings, is a specification.

This invention relates to catches for wardrobe and other doors, and forgeneral cabinet and carpentry work; and it'consists essentially of acase having within it a spring-supported screw-threaded stud providedwith 'an'adjustablebolt,substantiallyashereinafterdescribed, whereby theextent of the protrusion of the bolt beyond the case may be regulated atwill.

Figure l represents in front elevation a pair of doors supposed to formpart of awash-stand, the wood-work being somewhat broken out .to showthe catch and striking-plate. a detail of the striking-plate. l Fig. 3is a longitudinal vertical section of the bolt-case, bolt, and spring,the studbcing shown in elevation. Fig. 4 is a cross-section of thecatch, and Fig. 5 represents a device for adjusting the bolt upon thestud.

In the drawings, a c represent a pair of doors of, say, a wash-stand,only a part of which is shown, the said doors being hinged, so as to beopened or closed. In this instance of my invention the striking-plate bisconnected with the upper endof the door a, and the catch is shown asinserted in a horizontal cross-stripV the case, having a head, d', andthe spring e and adjustable bolt f, secured'upon the said stud, the bolthaving one or more grooves or openings, g, or it may be shoulders, toreceive the points h 0f a device, t', resembling a fork,

Eig. 2 is.

as shown in Fig. 5. The case c will preferably be formed by drawing atube ot metal and tlanging it, as at c', the case being made round inorder that it may be readily and quickly inserted into a hole made by anauger. The stud d is free to move longitudinally in case c as theconical outer end of the bolt f hits the strik ing-plate b, the spring ebeing then compressed and the llanged head d' of the stud movingbackward away from the inner end of the case.

When the door ot is closed more or less power will have to be applied tothe knob m to open the door, the `power depending entirely upon thestiffness of the spring e, which acts upon the boltf.

By adjusting the boltf out and in upon the screw-threaded portion ot'the stud d more or less of the power of the spring e can beutilized tokeep the conical end of the bolt pressed into the hole b2 of thestriking-plate b,and this adjustment of the bolt, iu accordance with myinvention, may be quickly and easily made from the outer end ofthe boltby the device i, the prongs of which may be inserted into the opening g,to turn the bolt and screw it oft or on the stud d,vvhilc the square orother irregular surface of the latter near its head is prevented fromturning in the case.

I do not broadly claim a beveled bolt pressed or held outwardly by aspring to hold a door closed until by strain ou the door the force otthe spring is overcome. Y

I claimp As an improved article ot' manufacture, the herein-describedcatch, composed of the ease, the spiral spring, and the screw-threadedstud, extended loosely in the said case and provided with the boltf,made adjustable longitudinally thereon, all substantially as set forth.

1n testimony whereofl have signed my name to this specification in thepresence of two subscribing witnesses.

PETER FORG.

Witnesses G. W. GREGORY, ARTHUR REYNoLDs.

